/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.formats.avro;

import org.joda.time.DateTime;
import org.joda.time.DateTimeFieldType;
import org.joda.time.LocalDate;
import org.joda.time.LocalTime;

/**
 * Encapsulates joda optional dependency. Instantiates this class only if joda is available on the classpath.
 */
class JodaConverter {

	private static JodaConverter instance;
	private static boolean instantiated = false;

	public static JodaConverter getConverter() {
		if (instantiated) {
			return instance;
		}

		try {
			Class.forName("org.joda.time.DateTime", false, Thread.currentThread().getContextClassLoader());
			instance = new JodaConverter();
		} catch (ClassNotFoundException e) {
			instance = null;
		} finally {
			instantiated = true;
		}
		return instance;
	}

	public long convertDate(Object object) {
		final LocalDate value = (LocalDate) object;
		return value.toDate().getTime();
	}

	public int convertTime(Object object) {
		final LocalTime value = (LocalTime) object;
		return value.get(DateTimeFieldType.millisOfDay());
	}

	public long convertTimestamp(Object object) {
		final DateTime value = (DateTime) object;
		return value.toDate().getTime();
	}

	private JodaConverter() {
	}
}
